21265622506200 has 192 divisors, whose sum is σ = 71785950048000. Its totient is φ = 5187113648640.

The previous prime is 21265622506157. The next prime is 21265622506207. The reversal of 21265622506200 is 260522656212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21265622506207) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31831564 + ... + 32492763.

It is an arithmetic number, because the mean of its divisors is an integer number (373885156500).

Almost surely, 2^{21265622506200} is an apocalyptic number.

21265622506200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21265622506200 is an abundant number, since it is smaller than the sum of its proper divisors (50520327541800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21265622506200 is a wasteful number, since it uses less digits than its factorization.

21265622506200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64324394 (or 64324385 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 21265622506200 in words is "twenty-one trillion, two hundred sixty-five billion, six hundred twenty-two million, five hundred six thousand, two hundred".